Ludo', That was swift, thanks! IANAC++. Ludovic Courtès 写道: > diff --git a/nix/libstore/local-store.cc > b/nix/libstore/local-store.cc > index 3b08492c64..3793382361 100644 > --- a/nix/libstore/local-store.cc > +++ b/nix/libstore/local-store.cc > @@ -88,8 +88,9 @@ LocalStore::LocalStore(bool reserveSpace) > > Path perUserDir = profilesDir + "/per-user"; > createDirs(perUserDir); > - if (chmod(perUserDir.c_str(), 01777) == -1) > - throw SysError(format("could not set permissions on > '%1%' to 1777") % perUserDir); > + if (chmod(perUserDir.c_str(), 0755) == -1) > + throw SysError(format("could not set permissions on > '%1%' to 755") > + % perUserDir); > > mode_t perm = 01775; This is inside if (getuid() == 0 && settings.buildUsersGroup != "") { … } It's not clear to me why the second condition here is relevant, but I don't have the big picture. Nor do I suspect I want it. Kind regards, T G-R